Amazon EC2 Auto Scaling introduced batch instance termination, allowing users to terminate up to 100 instances in a single API call.

Key Details

• Enables passing up to 100 instance IDs to the TerminateInstanceInAutoScalingGroup API in a single call
• Reduces the number of API calls required to scale down Auto Scaling groups
• Designed for AI/ML training jobs, container orchestrators, and event-driven architectures
• Atomically validates all instances in a batch before termination begins
• Preserves lifecycle hooks and load balancer connection draining for each instance in the batch
• Available across all AWS Regions at no additional cost

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